My DS is 7 months. We ended up co-sleeping after three nights on the run when I woke up in an armchair having fallen asleep feeding him, which seemed too dangerous to risk again, so it was never a particular plan to co-sleep. Although I have loved it.
From about 7pm he feeds/naps on a pillow on my lap until we all go to bed at 11pm. A few cursory attempts to put him in his cot (attached to the bed) on his own earlier in the evening have led to pretty much immediate screaming.
I am now at the point where I could really do with an hour to myself in the evening, which I haven't had since he was born. I am so envious of mothers whose babies go down at 7 or 8pm giving them their evening back...I haven't had an uninterrupted bath or shower since August.....